Java使用ElasticSearch API设置Mapping

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最近一个项目要接PLC下位机的数据存放到ElasticSearch，数据都是double的数值类型，因此在接的时候需要进行Mapping：

"rEva_Photo_x2": {"type": "double"},"AlarmbAlignConvInverter": {"type": "double"},"AlarmbAlignConvLoseErr": {"type": "double"},"AlarmbAlignFor": {"type": "double"},"AlarmbInConvLoseErr": {"type": "double"},"AlarmbLowerlimit": {"type": "double"},................

设置Mapping和接入的代码如下：

	@Overridepublic void saveAideEs(SaveAideEs saveAideEs) {IndicesExistsResponse  indicesResponse = getClient().admin().indices().exists( new IndicesExistsRequest().indices(new String[]{saveAideEs.getIndex()})).actionGet();//如果Index不存在就创建Mapping会报错if(!indicesResponse.isExists()) {getClient().admin().indices().prepareCreate(saveAideEs.getIndex()).execute().actionGet();	PutMappingRequest mapping = Requests.putMappingRequest(saveAideEs.getIndex()).type(saveAideEs.getType()).source(getMapping(saveAideEs.getSource().keySet()));getClient().admin().indices().putMapping(mapping).actionGet();}//写入数据到ElasticSearchIndexRequestBuilder builder = getClient().prepareIndex(saveAideEs.getIndex(), saveAideEs.getType());builder.setSource(saveAideEs.getSource());builder.get();}//构造Mapping，keySet包含所有的字段private XContentBuilder getMapping(Set<String> keySet) {XContentBuilder mapping = null;try {mapping = jsonBuilder().startObject().startObject("properties");Iterator<String> it = keySet.iterator();  while (it.hasNext()) {  String str = it.next();if(str.equals("@timestamp"))	//跳过@timestamp字段continue;mapping.startObject(str).field("type", "double").field("index","not_analyzed").endObject();} mapping.endObject().endObject();} catch (IOException e) {e.printStackTrace();}return mapping;}

之后就可以对这些字段进行数值运算了，下面是个使用ElasticSearch-sql的例子：

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